# AB Converter — The Best Unit Converter

> A versatile unit converter supporting 93 units across 12 categories. (iPhone/iPad app by RockCat Studio Limited.)

- Source: https://appshunter.io/ios/app/ab-converter/id550382273 (this page in markdown: same URL + `.md`)
- Developer: [RockCat Studio Limited](https://appshunter.io/developer/368947195)
- Category: Utilities, Productivity
- Price: Free
- Rating: 2.50/5 from 2 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 8 MB
- Languages: American English
- Released: 2012-08-22
- Data updated: 2026-06-01
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/ab-converter/id550382273/reviews.md

## What is AB Converter?

AB Converter is a powerful unit conversion tool, it supports up to 93 different units under 12 categories (length, area, weight etc..). Three major features: express conversion, easy-to-use and multi-unit conversion. *Support languages: English, Traditional Chinese and Simplified Chinese. 

Unit list:

Length
- Millimeter (mm) 
- Centimeter (cm) 
- Meter (m) 
- Kilometer (km) 
- Inch (in) 
- Foot (ft) 
- Furlong (fur) 
- Yard (yd) 
- Mile (mile) 

Area
- Sq. Millimeter (mm²) 
- Sq. Centimeter (cm²) 
- Sq. Meter (m²) 
- Sq. Kilometer (km²) 
- Sq. Inch (in²) 
- Sq. Foot (ft²) 
- Sq. Yard (yd²) 
- Sq. Mile (mile²) 
- Acre (ac) 

Weight 
- Pound (lb) 
- Ounce (oz) 
- Tonne (t) 
- Kilogram (kg) 
- Gram (g) 
- Milligram (mg) 
- Carat (ct) 
- Stone (st) 
- Chinese-斤 (斤) 
- Chinese-両 (両) 
- Chinese-分 (分) 

Volume
- Liter (L) 
- Milliliter (mL) 
- Imperial-Gallon (gal) 
- US-Gallon (gal) 
- Imperial-Pint (pt) 
- US-Pint (pt) 
- Cup (c) 
- Tablespoon (tbsp) 
- Teaspoon (tsp) 
- Petroleum-Barrel (bl) 
- Cubic Centimeter (cm³) 
- Cubic Meter (m³) 
- Cubic Inch (in³) 
- Cubic Foot (ft³) 
- Cubic Yard (yd³) 

Temperature 
- Celsius (°C) 
- Fahrenheit (°F) 
- Kelvin (K) 
- Rankine (°R) 

Time 
- Second (s) 
- Minute (min) 
- Hour (h) 
- Day (day) 
- Week (week) 
- Year (year) 
- Millisecond (ms) 
- Microsecond (μs) 
- Nanosecond (ns) 

Angle 
- Degree (°) 
- Gradian (grad) 
- Radian (rad) 

Data 
- Byte (B) 
- Kilobyte (kB) 
- Megabyte (MB) 
- Gigabyte (GB) 
- Terabyte (TB) 
- Petabyte (PB) 
- Bit (b) 
- Kilobit (kb) 
- Megabit (Mb) 
- Gigabit (Gb) 
- Terabit (Tb) 
- Petabit (Pb) 

Body Fitness 
- Calorie (cal) 
- Kilocalorie (kcal) 
- Joule (J) 
- Kilojoule (KJ) 
- Megajoule (MJ) 

Force 
- Newton (N) 
- Dyne (dyn) 
- Kilogram-Force (kgf) 
- Pound-Force (lbf) 
- Poundal (pdl) 

Power 
- Watt (W) 
- Kilowatt (kW) 
- Megawatt (MW) 
- Metric Horsepower (hp) 

Pressure 
- Pascal (Pa) 
- Kilopascal (kPa) 
- Megapascal (MPa) 
- Bar (Bar) 
- Torr (Torr) 
- Pound/Sq. Inch (psi) 
- Pound/Sq. Foot (psf)

## Key features

- Converts 93 units
- 12 conversion categories
- Express conversion
- Easy-to-use interface
- Multi-unit conversion
- Supports 3 languages

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/ab-converter/id550382273/reviews.md

### 1/5 — Won't run

*2016-12-08*

Locked right away on my iPhone 6 Plus.  Skip this.  It doesn't work.

### 1/5 — 點解有bug

*2015-07-17, version 1.1*

更新之後不能轉換單位選擇，好像down 一樣,請修正bug

### 1/5 — 最近沒有更新？

*2015-07-08, version 1.1*

完全改變不到單位，好像Down 機，沒有反應啊😓😱

### 4/5 — 好用

*2012-08-25, version 1.0*

簡單易用. 不錯

## Frequently asked questions about AB Converter

### What units can AB Converter convert?

AB Converter supports conversions for 93 different units across 12 categories, including length, area, weight, volume, temperature, time, angle, data, body fitness, force, power, and pressure.

### Does AB Converter support multiple languages?

Yes, AB Converter supports English, Traditional Chinese, and Simplified Chinese, making it accessible to a wider range of users.

### What are the main features of AB Converter?

The app's key features include express conversion for quick calculations, an easy-to-use interface for a smooth user experience, and multi-unit conversion capabilities.

### What devices is AB Converter available on?

AB Converter is available on iPhone, iPad, and iPod devices.

### How often is AB Converter updated?

The app was last updated on May 11, 2021, indicating a less frequent update cycle.

### Does AB Converter have ads?

Yes, AB Converter contains advertisements.

### What is the age rating for AB Converter?

AB Converter has an age rating of 4+, making it suitable for young users and above.

### What is the user rating for AB Converter?

AB Converter has a rating of 2.5 stars from 2 ratings, suggesting a mixed user reception.

## Version history (last 5 releases)

### 2.6 — 2021-05-11

- Minor fix.

### 2.5 — 2021-04-01

- Minor fix.

### 2.3 — 2021-03-02

- Minor fix.

### 2.2 — 2021-02-23

- Minor fix.

### 2.1 — 2020-08-02

*** Major update ***

- Completely re-coding the whole app.
- UI improvement.
- Minor fix.

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All apps by RockCat Studio Limited: https://appshunter.io/developer/368947195

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*